...Fig. 2. Back-scattered electron images and X-ray maps of Ca, Al, Fe, and Ce for an epidote-allanite crystal from the Newberry pegmatite, Nevada. The zoned crystal consists of a core of allanite that exhibits irregular compositional zoning related to variable Ce content and is rimmed by epidote...

... relatively late in the crystallization history ( Newberry and Swanson, 1986 ; Meinert, 1993 ), and are coarse grained, have low W contents, lack hydrothermal alteration, and are commonly associated with pegmatite dikes ( Meinert et al., 1980 ; Newberry and Einaudi, 1981 , Newberry and Swanson, 1986...

... of the granular quartz vein of the Kyshtym quartz deposit. Platy and partly scrolled molybdenite occur in the same phengite rock from the outer contact of the quartz–feldspar pegmatite of the Slyudyanogorsk mica deposit. Both occurrences are located in the Ufaley metamorphic block in the South Urals. Scroll-like...

..., 1996 ; Newberry, 1998 ); as discussed earlier, this is key to melt-vapor partitioning. In general, these granitic magmas had intermediate redox characteristics, although Vokes (1963) noted that pyrite and pyrrhotite occur with molybdenite in the Grenvillian pegmatites; the Moss Mo pegmatite...

... The Society of Economic Geologists, Inc Dating of intrusions and ore (e.g., Fort Knox, Dublin Gulch, Pogo, Shotgun, and Timbarra: Hart et al., 2001 ; Mustard, 2001a ; Rombach and Newberry, 2001 ; Selby et al., 2002 ), suggesting synchronous magmatic and hydrothermal activity; Geological...

... in the genetically related plutons ( Newberry et al., 1990 ). At Cantung, Canada, the occurrence of titanite in high-grade scheelite skarn is related to titanium-liberating reactions in the adjacent monzogranite ( Keith et al., 1989 ). At Nevoria, the combined evidence suggests that the zoned granite-pegmatite...

... there was a late event characterized by pegmatites, dike swarms, breccia pipes, and intense fracturing associated with the retrograde alteration, which was superimposed on massive skarn. The retrograde skarn has a complex paragenesis that can be divided into two substages. In the first, subcalcic garnet formed...

... with late-Early to Late Cretaceous reduced granitoids that are divided into a granite suite, tonalite suite, and diorite suite in decreasing age. Synkinematic to postkinematic biotite ± hornblende granite, granodiorite, pegmatite, and two-mica granite with accessory garnet compose the granite suite (109–107...

...Lawrence D. Meinert; David R. Lentz; Rainer J. Newberry † Corresponding author: e-mail, [email protected] Economic Geology 2000 Mining of skarn deposits dates back at least 4,000 years, and evidence of the mining of skarns can be found in the Chinese, Greek, and Roman empires...

... representing end-member differentiates of Cretaceous and Tertiary felsic intrusive suites. Pogo is likely one of a growing number of this type of gold deposit designated “plutonic-related” ( McCoy et al., 1997 ), “intrinsic” ( Newberry et al., 1995 ), or of “intrusion-related” affinity ( Thompson et al., 1999...

... of the most significant resources including Donlin Creek (117 Mt at 3 g/t Au: Ebert, 2003 ; Goldfarb et al., 2004 ), Fort Knox (169 Mt at 0.9 g/t Au: Bakke, 1995 ), Shotgun (~1 Moz: Rombach and Newberry, 2001 ), and Pogo (10 Mt at 16 g/t Au: Smith et al., 1999 ; Rhys et al., 2003 ) in Alaska...

... ( Newberry et al., 1998 ). At Fort Knox, the U-Pb zircon (92.5 ± 0.2 Ma) and Re-Os molybdenite (92.4 ± 1.2 Ma) dates are indistinguishable within uncertainty ( Fig. 3 ), and indicate that molybdenite and gold deposition were coeval with crystallization of the pluton, confirming an intrusion...

... kbars ( Rombach and Newberry, 2001 ). Sheeted vein deposits: Sheeted vein-style deposits are common in the deeper intrusion-related gold systems. The largest deposit of this type is Fort Knox (Alaska), which is characterized by mineralized pegmatites and sheeted veins hosted by Middle...

... a new, globally widespread class of intrusion-related deposits in which gold is the principal commodity has been proposed ( Fig. 1 ; Sillitoe, 1991; Hollister, 1992; Newberry et al., 1995; Lang et al., 1997; McCoy et al., 1997; Thompson et al., 1999). Collectively this class manifests an association...

... Mesozoic granites. Most W, Sn, and Mo skarn deposits are classified according to their major metal content ( Kwak and Askins, 1981 ; Newberry and Einaudi, 1981 ; Einaudi et al., 1981 ; Newberry and Swanson, 1986 ; Kwak, 1987 ; Meinert, 1991 , 1993 ; and Newberry, 1998 ). The Shizhuyuan...

... to gabbroic compositions, pegmatites, and carbonatites (see a summary by Huberty et al. 2012 ). Early studies report a range in SiO 2 of up to 8 wt% for silician magnetite, especially the magnetite from Porphyry and Skarn ore deposits ( Shimazaki 1998 ; Shiga 1988 , 1989 ; Westendorp and Watkinson 1991...

...Mark D. Barton; Steven Young © The Mineralogical Society Of America 2002 Non-pegmatitic occurrences of Be minerals constitute a diverse set of geologic environments of considerable mineralogical and petrological interest; they currently provide the majority of the world’s Be ore...

... that the gold skarns in the Southern Cross area are related in space and time to a suite of magnetite series granite-pegmatite complexes. These granites, dated regionally at 2.66 to 2.60 Ga, are also associated with gold-bearing W-Mo skarn-greisen or skarn systems of up to 6-km strike length. The numerous...

... lamprophyre, pegmatite, and aplite dikes also occur in the Clear Creek area. Zones of secondary biotite and associated silicified hornfels in rocks of the Hyland Group extend for as much as 0.5 km surrounding the stocks. Biotite, andalusite, sillimanite, cordierite, staurolite, and chloritoid...